Probation sentences involve; a. a deserving suspect b. a contract between the prison and the offender where they are released early c. rules or conditions mandated by the prison d. a deserving defendant

The answer is option "d",  "a deserving defendant".
Probation is the suspension of a prison sentence that permits a man indicted a wrongdoing the opportunity to stay in the group, rather than going to imprison. Probation requires that you take after certain court-requested principles and conditions under the supervision of a probation officer.